Get rid of “Bad value X-XRDS-Location for attribute http-equiv on XHTML element meta.” in XHTML5 validation

Question

I have an XHTML 5 page served with application/xhtml+xml which I want to get to validate, but the validator gives me trouble in its validation results:

Line 17, Column 89: Bad value X-XRDS-Location for attribute http-equiv on XHTML element

The line in question is:

<meta http-equiv="X-XRDS-Location" content="http://shlomif.livejournal.com/data/yadis" />

How can I fix this problem? Was an arbitrary "http-equiv" value removed from the XHTML 5 specification?

@bwoebi: It's the XML serialization of HTML5. There is no standalone XHTML5 specification however. — BoltClock, Jun 15 '13 at 13:56
Thanks! I ended up setting it in an Apache "Header" directive. — Shlomi Fish, Jun 16 '13 at 18:26

score 4 · Answer 1 · edited Jun 20 '20 at 09:12

4

http://www.w3.org/TR/html-markup/meta.html says:

Changes in HTML5

Although previous versions of HTML allowed the http-equiv attribute on the meta element to have any number of possible values, the http-equiv attribute is now restricted to only the specific values described in this reference. Also, the new charset attribute is now allowed.

So, yes, it is not allowed anymore.

edited Jun 20 '20 at 09:12

Community

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answered Jun 15 '13 at 13:52

bwoebi

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@ShlomiFish If this answer solved your problem, consider upvoting and accepting it, by clicking on the large green tick mark (✔) under the answer's score. – bwoebi Jun 15 '13 at 14:49

score 1 · Accepted Answer · answered Jun 15 '13 at 15:43

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In (X)HTML5, you may only use http-equiv values that are

defined in the HTML5 spec, or
registered in the WHATWG wiki page "PragmaExtensions".

If you think X-XRDS-Location would be a useful value, you’d have to register it.

answered Jun 15 '13 at 15:43

unor

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Get rid of “Bad value X-XRDS-Location for attribute http-equiv on XHTML element meta.” in XHTML5 validation

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